Yamaha PSR-1500 Service Manual page 33

(XW148A00)
HD74LVC245ATELL
(XW744A00)
HD74LV245ATELL
Octal 3-State Bus Transceiver
DM: IC023-026,030,031,046,047,055
(PSR-1500)
DM2-E: IC020-023,027,028,042,043,054,056,057
(PSR-3000)
D1R 1
20
A1 2 19
A2 3
18
A3 4
17
A4 5
16
A5 6
15
A6 7 14
A7 8 13
A8 9 12
GND 10 11
(XN883A00)
TC7W14FU
(XY806A00)
TC7WH14FU
Triple lnverter
DM: IC004,005,006,008,010,054 (PSR-1500)
1A 1
3Y
2
3
2A
4
GND
(X3119A00)
LM3525MX-H
USB Power Switch
DM: IC014 (PSR-1500)
DM2-E: IC011 (PSR-3000)
EN OUT
1 8
FLAG IN
2 7
GND OUT FLAG
3 6
NC NC
4 5
HD74LV273ATELL
Octal D-Type Flir Flop
DM: IC045 (PSR-1500)
DM2-E: IC036,041 (PSR-3000)
CLEAR
1Q
V
CC
1D
G
2D
B1
2Q
B2
3Q
B3
3D
B4
4D
B5
4Q
B6
10
GND
B7
B8
TC7W32FU(TE12L)
Dual 2 Input OR Gate
DM: IC003,041 (PSR-1500)
1A
8 Vcc
1B
1Y
7
2Y
6
3A
GND
5
2Y
IN OUT
7 8
Error
FET
Detect
Drive
2
and
Shutdown
EN
1
Control
(X2689A00)
1 20
VCC
2 19
8Q
Q Q
CL CL
3 18
D CK CK D
8D
4 17
7D
D CK CK D
CL CL
5 Q Q 16
7Q
6 15
6Q
Q Q
CL CL
7 D CK CK D 14
6D
8 13
5D
D CK CK D
CL CL
9 Q Q 12
5Q
11 CLOCK
(XQ173A00)
1 8 Vcc
1Y
2 7
3 6 2B
2A
4 5
Pin No. Pin Name
1 EN Enable (Input): Logic-compatible enable input.
(LM3525-L)
EN
(LM3525-H)
2 FLG Fault Flag (Output): Active-low, open-drain output. Indicates overcurrent, UVLO,
and thermal shutdown.
3 GND Ground
4, 5 NC Not internally connected.
7 IN Supply Input: Input to the power switch and the supply voltage for the IC.
6, 8 OUT Switch Output: Output of the high side switch. Pins 6 and 8 must be tied together.
PSR-1500/PSR-3000
(XN567A00)
TC7WU04F
Triple Inverter
DM2-E: IC025,026,059 (PSR-3000)
1A
1 8
3Y
2 7
2A
3 6
GND
4 5
(X0506A00)
M5233FP-600D
Comparator
DM: IC009 (PSR-1500)
DM2-E: IC008 (PSR-3000)
Output1 1 +V 8
CH1
Inverting
2 7
Input 1
- +
CH2
Non-Inverting
3 6
Input 1 + -
-DC Voltage Supply 4 -V 5
Pin Function
Vcc
1Y
3A
2Y
+DC Voltage Supply
Output2
Inverting
Input 2
Non-Inverting
Input 2
33